compiz crashed with SIGSEGV in ubus_server_pump_message_queue()

[Joshua Lückers]

Binary package hint: unity

Sometimes the desktop randomly freezes.

ProblemType: Crash
DistroRelease: Ubuntu 11.04
Package: unity 3.8.4-0ubuntu1
ProcVersionSignature: Ubuntu 2.6.38-8.41-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic x86_64
Architecture: amd64
Date: Fri Apr 8 13:55:12 2011
Disassembly: => 0x1fba0: Cannot access memory at address 0x1fba0
ExecutablePath: /usr/bin/compiz
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Beta amd64 (20110408)
ProcCmdline: compiz
ProcEnviron:
 LANGUAGE=en_US:en
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0x1fba0: Cannot access memory at address 0x1fba0
 PC (0x0001fba0) not located in a known VMA region (needed executable region)!
SegvReason: executing unknown VMA
Signal: 11
SourcePackage: unity
StacktraceTop:
 ?? ()
 ?? () from /usr/lib/compiz/libunityshell.so
 g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
 ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
 g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
Title: compiz crashed with SIGSEGV in g_main_context_dispatch()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare

[Apport retracing service (apport)]

StacktraceTop:
 ?? ()
 ubus_server_pump_message_queue (server=<value optimized out>) at /build/buildd/unity-3.8.4/src/ubus-server.cpp:284
 g_main_dispatch (context=0x244f700) at /build/buildd/glib2.0-2.28.5/./glib/gmain.c:2440
 g_main_context_dispatch (context=0x244f700) at /build/buildd/glib2.0-2.28.5/./glib/gmain.c:3013
 g_main_context_iterate (context=0x244f700, block=<value optimized out>, dispatch=1, self=<value optimized out>) at /build/buildd/glib2.0-2.28.5/./glib/gmain.c:3091

[Neil J. Patel (njpatel)]

Hi, had you been using multiple monitors before the crash?

[Joshua Lückers (joshualuckers)]

Yes. I attached my normal screen to my laptop. Disabled the laptop screen and afterwards the freeze occurred. It did not happen immediately but after a little while of using the screen. The same happens when I did a reboot however the screen was already attached and my laptop screen disabled.

[Neil J. Patel (njpatel)]

Excellent, thanks for the feedback. I've fixed this bug in the attached branch.

[Launchpad Janitor (janitor)]

This bug was fixed in the package unity - 3.8.6-0ubuntu1

---------------
unity (3.8.6-0ubuntu1) natty; urgency=low

  * New upstream release.
    - compiz crashed with SIGABRT in raise() (LP: #748163)
    - System freezes when maximize button is clicked (LP: #754063)
    - compiz crashed with SIGSEGV in QuicklistView::IsMenuItemSeperator()
      (LP: #754302)
    - compiz crashed with SIGSEGV in std::_List_node_base::_M_hook()
      (LP: #754235)
    - compiz crashed with SIGSEGV in ubus_server_pump_message_queue()
      (LP: #754657)
    - drag from dash to launcher (LP: #662616)
    - Add a test case for unity-decorator regressions (LP: #736878)
    - the files place category combo has empty space (LP: #741641)
    - panel superposition (LP: #742859)
    - Unity Launcher stops autohiding and is not responsive (LP: #744325)
    - Unity Launcher stops autohiding and is not responsive (LP: #744325)
    - [FFE] Need API to set urgency from background process (LP: #747677)
    - Launcher - Escape from 'drag behind the Launcher' interaction
      (LP: #750298)
    - Launcher needs to be desaturated when Dash is open, not transparent.
      (LP: #750358)
    - compiz crashed with SIGSEGV in free() (LP: #752293)
    - migrate_favorites.py crashed with ImportError in __main__: No module
      named gconf (LP: #752176)
    - compiz crashed with SIGSEGV in PluginClassHandler<DecorWindow,
      CompWindow, 0>::get() (LP: #743807)
    - cannot close the dash by clicking on the bfb (LP: #753914)
    - Animation for Grid Previews is broken (LP: #754088)
    - compiz crashed with SIGSEGV in PanelMenuView::OnPlaceViewShown()
      (LP: #754585)
    - Pressing F10 then "left arrow" wit Unity on Natty makes the system
      unusable (LP: #756867)
    - compiz crashed with SIGSEGV in __pthread_mutex_lock() (LP: #711231)
    - Tooltips and Dash Font Problems (LP: #741605)
    - Title elipisising incorrect. Type “Shotwell” for a good example
      (LP: #750350)
    - compiz crashed with SIGSEGV in Launcher::Launcher() (LP: #748096)
    - BFB - Turn top left corner blue rather than Ubuntu logo (LP: #755286)
    - launcher appears and gets stuck when resizing windows with mouse
      (LP: #754690)
    - Wrong item gets dragged out (LP: #729796)
    - Launcher - when the launcher is folded, the bottom icon partially falls
      off the end of the screen (LP: #731869)
    - unity-window-decorator: Resize padding: Tiny focused windows lose resize
      padding and shadow when <69 pixels wide (LP: #737707)
    - Deinstalling an application with launcher entry leaves orphaned shortcut
      (LP: #748107)
    - Two Nautilus windows open when clicked on a device icon on Launcher
      (started after 3.8.2) (LP: #748299)
    - compiz crashed with SIGSEGV in Launcher::AnimationTimeout()
      (LP: #749890)
  * debian/control:
    - build-dep on latest nux (ABI break)
  * debian/unity-common.install:
    - install the desktop file for the new capplet
 -- Didier Roche <email address hidden> Mon, 11 Apr 2011 12:42:33 +0200